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原文連結
論文資訊
- 類型：已發表論文
- 日期：2009
摘要
物種 loss in ecosystems can lead to secondary extinctions as a result of consumer-resource relationships and other 物種 interactions. We compare levels of secondary extinctions in communities generated by four structural food-web models and a fifth null model in response to sequential primary 物種 removals. We focus on various aspects of food-web structural integrity including robustness, community collapse and threshold periods, and how these features relate to assumptions underlying different models, different 物種 loss sequences and simple measures of 多樣性 and complexity. Hierarchical feeding, a fundamental characteristic of food-web structure, appears to impose a cost in terms of robustness and other aspects of structural integrity. However, exponential-type link distributions, also characteris
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